ON STRENGTH AND PROPERTIES OF CAST IRON, 383 
Comparative results of Coed-Talon Iron No. 2. 
Distance between supports 4 ft. Gin. and 2 ft. 3 in. 
Strength of Cold Blast Iron. | Strength of Hot Blast Iron. Ratio of strengths. 
se Mean 402-8] Mean 
5 408-7 4156 f 409-2 1000 : 1001 
418°8 
837-2) Mean 835-5) Mean 
836°6 { 836-9 8623 [ 848:9 1000 : 1014 
Mean ratio of strengths, 1000 : 1007 
Results of products, and ratio to resist impact. 
Product of strength by ulti- 
mate deflection in Cold 
Blast Iron. 
Product of strength by ulti- 
mate deflection in Hot 
Blast Iron. 
Ratio of products, or of 
power to resist impact. 
7496 | Mean bi: 
7942 [ 7719 1000 : 1285 
307-2) Mean 327-5] Mean ee 
374-2 [ 3508 1000 ; 1184 
295'3 [ 296-2 
Mean ratio of powers to sustain impact, 1000 : 1234 
Modulus of elasticity in ths. for a base of an inch square. 
Cold Blast Iron...... 14680000 
DO. sc acccess duasuscssce es 13947000 
Mean... 14313500 
Hot Blast Iron...... 15810000 
Mean... 14322500 
___ Note.—The modulus of elasticity was taken in this, as well as in other cases, from 
the 4 ft. Gin. bars, and from the deflection caused by 112 lbs. 
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